Automotive alternator rotor

Abstract

An automotive alternator rotor includes: a pair of magnetic pole cores; a field coil that is disposed on the magnetic pole cores; and a cooling fan that is fixed to the magnetic pole cores. The cooling fan includes: a base portion that is fixed to an axial end surface of the magnetic pole cores; and a plurality of vane portions that protrude axially from the base portion. A jamming suppressing portion that suppresses jamming together of cooling fans when one of the cooling fans is stacked on another of the cooling fans is disposed on the base portion.

The invention claimed is: 
     
       1. An automotive alternator rotor comprising:
 a pair of magnetic pole cores that each comprise a plurality of magnetic pole claws; 
 a field coil that is disposed on the magnetic pole core; and 
 a cooling fan that is fixed to the magnetic pole core, 
 wherein: 
 the cooling fan comprises:
 a base portion that is fixed to an axial end surface of the magnetic pole core; and 
 a plurality of vane portions that protrude axially from the base portion; 
 
 a plurality of jamming suppressing portions that suppresses jamming together of cooling fans when one of the cooling fans is stacked on another of the cooling fans, disposed on the base portion; 
 the jamming suppressing portions being disposed at different positions in a circumferential direction of the base portion; and 
 the jamming suppressing portions being disposed at corners of portions of edge portions of the base portion where the vane portions are separated. 
 
     
     
       2. The automotive alternator rotor according to  claim 1 , wherein the jamming suppressing portions are configured by a portion of the base portion being bent and raised in an axial direction. 
     
     
       3. The automotive alternator rotor according to  claim 2 , wherein the jamming suppressing portions are disposed so as to be spaced apart from the vane portion. 
     
     
       4. The automotive alternator rotor according to  claim 1 , wherein the jamming suppressing portions are disposed so as to be spaced apart from the vane portion.